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We survey some recent developments in the study of canonical K\"{a}hler metrics on algebraic varieties and their relation with stability in algebraic geometry.

Differential Geometry · Mathematics 2022-07-07 Chi Li

We develop estimates for the equation of scalar curvature of singular metrics with cone angle $\beta>1$, in a big and semi-positive cohomology class on a K\"ahler manifold. We further derive the Laplacian estimate for the scalar curvature…

Differential Geometry · Mathematics 2022-05-31 Kai Zheng

The article reviews some of the (fairly scattered) information available in the mathematical literature on the subject of angles in complex vector spaces. The following angles and their relations are considered: Euclidean, complex, and…

History and Overview · Mathematics 2011-10-20 K. Scharnhorst

We study symplectic structures on K\"ahler surfaces with p_g = 0. We give an example of a projective surface which admits a symplectic structure which is not compatible with any K\"ahler metric.

Symplectic Geometry · Mathematics 2010-12-17 Paolo Cascini , Dmitri Panov

We give a formula to compare the Quillen metrics associated to a branched covering from holomorphic line bundles.

Differential Geometry · Mathematics 2023-01-31 Xiaonan Ma

The paper is part of an attempt of understanding non-K\"ahler threefolds. We start by looking at compact complex non-K\"ahler threefolds with algebraic dimension two and admitting locally conformally K\"ahler metrics. Under certain…

Differential Geometry · Mathematics 2023-03-21 Daniele Angella , Maurizio Parton , Victor Vuletescu

We prove an equivariant deformation result for Hamiltonian stationary Lagrangian submanifolds of a Kahler manifold, with respect to deformations of its metric and almost complex structure that are compatible with an isometric Hamiltonian…

Differential Geometry · Mathematics 2015-11-23 Renato G. Bettiol , Paolo Piccione , Bianca Santoro

We study Kahler surfaces with harmonic anti-selfdual Weyl tensor. We provide an explicit local description, which we use to obtain the complete classification in the compact case. We give new examples of extremal Kahler metrics, including…

Differential Geometry · Mathematics 2007-05-23 Vestislav Apostolov , David M. J. Calderbank , Paul Gauduchon

Motivated by understanding the limiting case of a certain systolic inequality we study compact Riemannian manifolds having all harmonic 1-forms of constant length. We give complete characterizations as far as K\"ahler and hyperbolic…

Differential Geometry · Mathematics 2008-10-10 Paul-Andi Nagy

We study asymptotic estimates of the dimension of cohomology on possibly non-compact complex manifolds for line bundles endowed with Hermitian metrics with algebraic singularities. We give a unified approach to establishing singular…

Complex Variables · Mathematics 2023-11-28 Dan Coman , George Marinescu , Huan Wang

We construct a supersymmetric quantum Hall liquid with a deformed supersymmetry. One parameter is introduced in the supersymmetric Laughlin wavefunction to realize the original Laughlin wavefunction and the Moore-Read wavefunction in two…

High Energy Physics - Theory · Physics 2014-11-18 Kazuki Hasebe

In this paper, we construct metallic K\"ahler and nearly metallic K\"ahler structures on Riemanian manifolds. For such manifolds with these structures, we study curvature properties. Also we describe linear connections on the manifold,…

General Mathematics · Mathematics 2019-07-02 Sibel Turanli , Aydin Gezer , Hasan Cakicioglu

In this article we investigate some properties of equivariant embeddings of a symmetric K\"ahlerian manifold. Motivated by a theorem of Cartan and Wallach on equivariant embeddings of symmetric spaces we characterize these embeddings in the…

Differential Geometry · Mathematics 2025-11-04 J. -H. Eschenburg , K. K. Santos , R. Tribuzy

In this article we show how holomorphic Riemannian geometry can be used to relate certain submanifolds in one pseudo-Riemannian space to submanifolds with corresponding geometric properties in other spaces. In order to do so, we shall first…

Differential Geometry · Mathematics 2016-04-20 Victor Pessers , Joeri Van der Veken

N = 2 supersymmetry in four space-time dimensions is intimately related to hyperkahler and quaternionic Kahler geometries. On one hand, the target spaces for rigid supersymmetric sigma-models are necessarily hyperkahler manifolds. On the…

High Energy Physics - Theory · Physics 2012-04-06 Sergei M. Kuzenko

In this survey, we give an introduction to nearly K\"ahler geometry, and list some results on submanifolds of these spaces. This survey tries by no means to be complete.

Differential Geometry · Mathematics 2024-01-11 Mateo Anarella

We derive necessary conditions for a complex projective structure on a complex surface to arise via the Levi-Civita connection of a (pseudo-)K\"ahler metric. Furthermore we show that the (pseudo-)K\"ahler metrics defined on some domain in…

Differential Geometry · Mathematics 2023-07-19 Thomas Mettler

We introduce a model for Hermitian holormorphic Deligne cohomology on a projective algebraic manifold which allows to incorporate singular hermitian structures along a normal crossing divisor. In the case of a projective curve, the…

Algebraic Geometry · Mathematics 2007-05-23 Ettore Aldrovandi

We construct explicit examples of quaternion-K\"ahler and hypercomplex structures on bundles over hyperK\"ahler manifolds. We study the infinitesimal symmetries of these examples and the associated Galicki-Lawson quaternion-K\"ahler moment…

Differential Geometry · Mathematics 2024-10-30 Udhav Fowdar

Grauert showed that the existence of a complete K\"{a}hler metric does not characterize domains of holomorphy by constructing such metrics on the complements of complex analytic sets in a domain of holomorphy. In this note, we study the…

Complex Variables · Mathematics 2020-07-21 Sahil Gehlawat , Kaushal Verma